Lesson #5 – Algebra II

Label the index, radical sign, and radicand in √128.

• Index: 2, Radical sign: √, Radicand: 128

• Index: 128, Radical sign: √, Radicand: 2

• Index: √, Radical sign: 2, Radicand: 128

• Index: 2, Radical sign: 128, Radicand: √

Simplify: √36

• ±6

• ±12

• ±3

• ±18

Tags

CCSS.8.EE.A.2

Simplify: √4x²

• ±2|x|

• ±4|x|

• ±2|x²|

• ±|x²|

Simplify: −√49

• ±7

• -7

• -49

• ±0

Tags

CCSS.8.EE.A.2

Simplify: ³√−27

• -3

• 3

• 9

• -9

Tags

CCSS.8.EE.A.2

Simplify: √81y²

• ±9|y|

• ±81|y|

• ±9|y²|

• ±18y

Simplify: √72

• ±6√2

• ±8√3

• ±4√3

• ±12√2

Determine whether √50 is rational or irrational.

• Irrational

• Rational

• Integer

• Whole number

Tags

CCSS.8.NS.A.1

The sum of 5 + √2 is irrational because:

• the sum of a rational and an irrational number is always irrational.

• the sum of two rational numbers is irrational.

• the sum of two irrational numbers is always rational.

• 5 is an irrational number.

Tags

CCSS.HSN.RN.B.3